One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,13)(12,14)(15,16)(17,18,23,27,22,26,29,31)(19,28,21,20,30,24,32,25)(2,5)(3,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,31)(21,23)(22,30)(25,27)(26,28)(29,32) involution — undirected(9,11,12,16)(10,13,14,15)(17,20)(18,21)(19,27)(22,25)(23,28)(24,29)(26,32)(30,31)(1,3,4,7)(2,6,5,8)(11,16)(13,15)(17,21)(18,25)(19,29)(20,26)(22,32)(23,30)(24,31)(27,28)(10,14)(13,15)(18,26)(19,30)(21,32)(27,31) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.